Build a simple HTML5 game ASAP

Hi, I need someone to build be a really simple white water rafting game in the next 5-6 hrs. It has to be in HTML5 and have a joystick control for the orientation of the raft (just rotation) and an up button to move forward at said orientation (100% speed) and a back button to move backwards (80% speed). There should be obstacles on the river including rocks and rapids. Colliding with a rock will jolt one of the 6 ppl on the raft into the water (when there are no more people on the raft you lose - game is over). Rapids propel the raft in the direction of the rapid (there can also be whirlpools which make the raft turn in circles a few times). All this should be on a randomly generated river path which gets more and more difficult to navigate. There should be 10 messages in a bottle that the player has to pick up (collide with) on his journey down the river. Each one will have some text above it and display a short message (pausing the game) when collected. The game start screen should have a button which says ready. Once the user presses that there should be another button that says fire. When he presses that it should propel the boat down the stream. Graphics should be clean and simple nothing to artsy just clear.